Underscreen window operator



y 24, 1934. A. H. SCHAFFEVRT 1,967,481

UNDERS GREEN WINDOW OPERATOR Filed June 6, 19'32 Patented July 24, 1934UNDERSCREEN WINDOW OPERATOR Adolf H. Schaffert, Youngstown, Ohio,assignor to Truscon Steel Company, Youngstown, Ohio, a corporation ofMichigan Application June 6, 1932, Serial No. 815,718

2 Claims.

This invention relates to new and useful improvements in underscreenwindow operators.

It is the principal object of my invention to provide in an underscreenwindow. operator, novel means of an effective character for firmlyholding the window sash in an adjusted position against movement by thewind or other forces.

In the accompanying drawing illustrating a preferred form of myinvention,

Figure 1 is a view of a screen and window assembly containing myunderscreen adjustably locked window operator.

Figure 2 is a bottom view of the window operating and locking mechanism,with the cover plate removed.

Figure 3 is a top plan view of the window operator, showing the buttonfor shifting the locking pawl.

Figure 4 is a side view of the same.

Referring to the accompanying drawing, the numeral 1 designates thebottom rail of a window sash that is hingedly secured for outwardmovement in front of a stationary screen 2.

The window 2 is-swung outwardly and inwardly by an operator 4 secured tothe usual frame bar, designated 3, by screws 3a. This operator comprisesa channel member 5, a sector arm 6, and handle, gear and pawl mechanismto be described.

The channel member 5 is secured by screws 7 in a rabbet formed withinthe under surface of the bottom rail 1 of the window sash. Slidable inthis channel member 5 is a runner 82) connected by a hinge pin 8 to theouter end of the arm 6. The latter terminates at its inner end in atoothed sector 8a that is free to turn upon a pivot stud 9 within a case10.

The arm 6 projects out of the case 10 through a fly-tight opening 11provided in the screen 2.

The sector 8a is engaged and turned by a gear 12 fast on the squaredportion of a handle 13 that is located outside the case.

It is the particular object of this invention to lock the window 1against movement in any of a plurality of adjusted positions. To thisend I have formed on the inner surface of the casing at one side of thegear 12, two straight parallel guide walls 14 that extend toward thesector 8a and provide a longitudinal guideway for a pawl 15.

The pawl 15 comprises a slidable member having a free longitudinalmovement between the guide walls 14. This pawl also has a rounded outerend to enter a semicircular recess formed at the outer end of theguideway and has teeth 16 at its inner end.

An operating 'button 18 on the exterior of the casing 10 has a shank 17that. passes through a slot 19 in the casing and is connected to thepawl 15. The pawl is urged into its locking position by means of ahelical spring 20 interposed between the rear wall of the casing and thepawl and having one end fitting in a recess in said pawl.

The teeth 16 of the pawl are oif center and enter the interdental spacesof the sector to effectively lock the latter against turning movement ineither direction. The pawl 15 may be easily shifted out of lockingposition with the sector by operating upon the exposed button 18, thusfreeing the arm 6 and permitting it to be swung by the handle 13 to anydesired position.

From the foregoing, it is thought that the construction, operation andmany advantages of the herein described invention will be apparent tothose skilled in the art without further description, and it will beunderstood that various changes in the size, shape, proportion and minordetails of construction may be resorted to without departing from thespirit or sacrificing any of the advantages of the invention.

What I claim, is

1. In a device of the type described, a casing, an operating arm havinga toothed sector portion pivotally secured within the casing, means forturning said sector, a guide on the inner surface of said casing,directed toward the sector, a pawl slidable along 'said guide, acompression spring between the outer wall of the casing and the outerend of the pawl to press the latter into engagement with the teeth ofthe sector, said casing formed with a longitudinal slot, and a fingergrip member to which the pawl is secured, and movable through said slot,to withdraw the pawl from engagement with the toothed sector.

2. ,In a device of the type described, a casing, an operating arm havinga toothed sector portion pivotally secured within said casing, means forturning said element, two parallel projections on the interior surfaceof said casing, directed toward the sector, said casing having alongitudinal slot between said projections, a slidable pawl between saidprojections, two parallel off center teeth on theinner end of said pawl,a compression spring between the outer end of said pawl and the outerwall of .the casing between the projections to press said teeth intoengagement with the teeth of the sector, and a finger grip element towhich the pawl is secured, and movable through said slot, to withdrawthe pawl from engagement with the toothed sector.

ADOLF H. SCHAFFERT.

